Core-making machine.



O. O. PETERSON.

GORE MAKING MACHINE;

- APPLICATION nun MAY 4, 1911v 1,030,326. b Ptented June 25,1912.

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d u w/v (9 W 6 O. O. PETERSON. CORE MAKING MACHINE. APPIKIGATION TILED MAY4,1911.

Patented June 25, 1912.

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a I IIIII? G. G. PETERSON. GORE MAKING MACHINE. APP'LLOATIONIIILE'PMAY 4, 1911. 1,030,326, Patented June 25, 191 3.

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O. G. PETERSON. GORE MAKING MACHINE. APPLICATION FILED MAY4,1911.

Patented'Ju ne 25, 1912.

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Eg ii ATENT OFFICE GHdItLES C. PETERSON, OF GIL CITY, PENNSYLVANIA.

CQEE-MAKING MACHINE.

menses.

Specification of Letters Patent. Patented June 25, 1912.

Application filed May a, 1911. Serial 1W0. 625,103.

To all whom it may concern: Be it known that I, C ARLES C. PE'rEnsoN.

. a citizen of the United States, resident of Oil Cit-y, county of Venango, and State of Pennsylvania, have invented a new and use- .tul Tm drove-merit in Core-Makin '-Machines. 1'3

of which the following is a specification, the principle of the invention being herein eic pla-iu'ed and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates to core-making machines, and particularly to the class of n1achines adapted to provide the core-box with the core-makini sand. C

The annexed drawings and the following description set forth in detail certain means embodying my invention, the disclosed; means, however,- constltutmg but one of various mechanical forms in which the princlple of the'invention may be applied.

in said annexed drawings:.Figure 1 is an elevation or" a machine embodying my invention, Fig. 2 is an axial section of the main portion of said machine on an en..- larged scale, and shown broken away at the center, Fig. 3 is a plan of the machine] Fig. 4 is'a detail bottom plan of the valve for'controlling' the discharge, or sand from the hopper. section of the sand-holder, showing the members thereof, in their nornia l or nonopcrating 'iositions. Fig. 6 is a view showing diagrammatically the construction of the semi-automatic valve for controlling the operation of the machine.

The machineillustrated by the drawings as embodying my invention comprises a base A u'ponwhich is secnred'two vertical guiding rods .13 B. The upper end oi each of.

.these i'od's is threaded, and upon these threads are mounted two nuts C C. Resting upon these nuts are two hollow bosses (Z cl formed on lateral extensions (5 (2 forming an integral part of the hopper T) which forms apart of a sand-holder D. li'uts C C are mounted upon the threads of the rods 13 B, and secure the hopper in place on the nuts-C C.

In addition to the hopper D. the sand holder 1) comprises a lower sand-discharg Fig. 5 is a fragmentary axial ing member- D? and a valve D This valve is of the pivoted gate variety, and has its pivotal axis located laterally of the hopper and in a halt d The free or swinging end" of the valve is provided with a handle (1 By moving the valve upon its axis, it will be seen that the lower or discharging end of the hopper may be open or closed.

The discharging member D is mounted below the hopper, and consists. of a hollow pot having its upper end open, forming an inlet opening, and its lower end closed by a plate (Z having a central discharge "o'pcn ing d Formed integrally with the sides of this pot are lateral project-ions d (Z which are formed with hollow bosses d d loosely surrounding the rods B B, asshown in F ig.

1. These bosses rest upon the collars B B which-are fixed to the rods by means of setscrews .7) ,7), whereby such collars may beadrods. These collars are in a position such that when the device. is inoperative. that is. when the bosses d restupon the-collars, the

. justed to assume various positions upon said upper or charging end of the pot isout of I contact with the valve D as shown in Figs. 1 and 5. That part of the valv'e directly opposite the end walls of-thepot D is providedwith an annular gasket D Fig.3. 'whichnormally' projects slightly below the lower surface of the valve, and made of yielding material'of a suitable nature. The extreme outer edge portion ofthe valve is provided with'an interior grorwe (i and the gasket is-formed with a flange n-ojecting. into this groove. The inner por ion of the flange is held in place by means of a removable plate (Z secured in place by means of screws d (1 as shown in Figs. '2 and 5.

Surrounding the upper end of the put I) is an annular air-duct. l) which communicates with the interior of the pot by means of a plurality of upwardly inclined-pa sages D This-duct is furthermore runm-ctcd with a' source --of pncunmtic pressure by means of a flexible pipe 1 1. as will be hcrciuafter explained.

" Fixed to the base A. and projecting \'crtlcally and midway between the rods l? llis a hollow standard F. Figs. 1. and E2. 'lhis cylinder H an interior air-chamber J. Sult- 'llll' able packing and glands are prori rendering the piston and cylinder air-j Formed upon the upper portion of the cylinder is a table H which is adapted to receive the core-boa and upon which the latt is adapted to rest Formed integrally h the cylinder are two lateral projections "i loosely and slidably mounted upon the .J B B. A pipe K connects the air-chamber d with the source of pneumatic pressure :L-GlfOli. mentioned, and in a manner hereinafter described.

The pipes E and K are connected with utletopenings of a semi-automatic valve L,

ovided with an operating lever L and an ing I; connected with the source of neu ' ther with an exhaust opening Z" conwith an exhaust pipe Z discharging atmosphere.

- evice as thus far described operates as follows: Assumingthe parts to be in their normal or inoperative position, in which the cylinder H and table H occup-y their lowermost position, and the discharge member or sand-pot D is in its lowermost position resting'upon the collars B B, so that its upper end is outof contact with the valve D and the latter being in its closed position, the hopper D is filled with the sand to be discharged into the core-box.

Said valve is now opened so as to permit the sand to fall down into the discharging member D and after this has been accom- 2 plisned the valve again closed, such valve bperation being permitted by reason oi the nonengagement of the member D with such valve. The core-box, shown in dotted lines in Fig. 1, is placed upon the table in a suitable position below the member D the position of the table-having first been adjusted by means of the screw F so as to allow the upper-end of the core-box to fall some distance below the lower end of said member D when the parts are in their nor-' mal or inoperative position. By now throwing the handle L over to the right, com- -munication is established between the source of pneumatic pressureand the air-chamber J. The consequent introduction of compressed air into said chamber causes the cylinder and table to rise, carrying the core-box with it, until the upper end of the latter strikes the lower end of member D thus establishing communication between the interior of the core-box and the interior of said member through the discharge open atic air pressure by means of a pipe such upper end is sealed. The'communication with the source of pressure continues until the member D brought to a stationary position, and until the pressure in the chamber J reaches a point such that an auxiliaryvalve in the interior of the valve L, as a result of such increased pressure, automatically establishes communication between the source of pressure and the interior of the member l) through the pipe E, air-duct D and openings D The air is thereupon discharged upwardly against the valve l), whence it is deflected downwardly against the sand in the interior of the pot. This action causes an air-pressure to be exerted upon the top of the-sand and the latter to be projected through the opening (Z into the core-box. After all the sand has been discharged from the holder, or the corebox has been filled, the communication is permitted to continue a sufiicient length of time so as to bring the pressure up to a point where it is suilicient to open a second auxiliary valve as a result of such increased pressure. which automatically shuts 01? communication between the source of pressure, the interior of the pot and the air-chamber J, and at the same time establishes communication between said interior and chamher and the exhaust outlet 5 and exhaust pipe Z This operation is attended by the movement of the lower end of the handle L to the left so as to re-assume its initialposition. The pressure thus being removed from the chamber 5', the latter drops as a result oi gravitation and the core-box may 'be removed, the member D similarly dropping to its normal position by gravity.

is before noted, Fig. 6 represents diagrammatically the construction of the semi automatic valve and its connect-ions with the discharging members D and the air-chamber J.

The ope ation of the above-described automatic valve is best explained by the diagrammatic illustration shown in Fig. 6. I shall now explain such operation by reference to said diagram.

I a valve-chamber l is a slide-Valve 2, of the ordinary D type, which controls three ports, 3, d and The port 3 is connected with a duct 6, in the valve casing, whose outlet opening is connected with the flexible pipe K, which, as before explained, communicates with the chamber J .of the machine. The port 5 is connected with the outlet Z and exhaush'and the port com municates with a duct 7. whose function will be hereinafter explained. .The valve 2 is arranged so that when the lower end of the lever L is thrown to its extreme position to the left, as shown in Fig. 1, said valve will permit communication between the ports 3 and 4; and the exhaust port5,'as shown in dotted lines in the diagran duct ,6 communicates with the duct 7, but i such communication is controlled bya spring-actuated valve 5 normally closed. This 'alve is held in such normally closed position by means of a spring 9 whose tension may be regulated by means of a screw 10. A duct 11 connects the ducts 7 andti with a second outlet in the casing to which is connected the pipe E which communicates with the interior of member D as before explained. By means of a duct 12, communication is established between the duct 11, and the interior of a cylinder 13, and this. communication is controlled by means of a spring-actuated valve 14 held normally closed by means of a spring 15 whose tension may be regulated by means of a screw 16. Vithin the cylinder 13 is a piston 17 to which is attached the valve rod. 18 extending into the valve chamber 1, and connected with the valve 2. The operating handle If is connectedin a suitable manner with the valve stem 18. The inlet opening Z of. the chamber 1 is connected with the pipe M "which communicates with a source of air-pressure.

Assuming now that the lower end of the operating lever L is in its extreme left position,. and that lower end is now manually thrown to the right so as to cause the piston 17 and valve 2 to be thrown to the left, it will be seen that communication is established between the source of pressure and the port 3. In this position the ports-4 and 5 arefcut oil? from communication with the valve chamber and hence with the source of pressures This permits the compressed air to enter the duct 6 and thence the pipe K, and raise the table and core-box. After the core-box and moving parts of the machine are brought to a stationary position, thepressure rises until it reaches a point such as to ettect the raising of the valve 8 against the action of the spring 9, this spring having been previously adjusted to exert the proper pressure on said valve. This permits the air to flow into duct 11, pipe E and member D The spring 15 is set so that it requires a further pressure to raise the-valve 1 1. hen the sand has been completely discharged-from the member D or thecore-box is filled, the continued com- 'munication with the source of pressure provides this increased pressure, and the raising of the valve M iseffected. This establishes communication between ducts 11- and 12, and permits the air to flow into the cylinder-13, and move the piston 17 to the right, and move the valve into the position indicated by dotted lines. This, as before.

explained, establishes communication be-' nnrt 3 and ports 4 and 5, which, as will be observed, ll permit the air from the chamber J to exhaust through the port a, and the air from the air-inlet member D to similarlyiexhaust through the ducts 11 and this manner, it will be seen that the machine is started by throwing the lower end of the operating handle L to the right, which effects the raising of the table H. Communication is thereupon automatically established with the interior of the member D and following such action the valve is automatically shifted so as to exhaust the chamber J and the interior of member D whereupon the parts of the machine assume their normal or inoperative positions by gravity, as previously explained.

Having fully described my. invention, what I claim and desire to secure by Let- 'ters Patent is 1. In a core-making machine, the comoperated means for establishing communicatlon between the lnterlor of said holder and a core box; means for introducing an sand therein may be discharged therefrom; a common source of pneumatic pressure 'connectedwith said means for establishing communication and said means for introducing air under pressure; and means for controlling the 130w of air through said two means, whereby; the air-pressure is introduced into said holder after communication between said holder and core-box has been established.

bination of a sand-holder; pneumatically operated means for'establishing communication between the interior of said holder and a core box; means for introducing air under thereinanay be discharged therefrom into sald sand-box; a common source of pneufor establishing communication and the means for introducing air under pressure; and means for controlling the flow of air from said source whereby said first-named means are first actuated and said secondnamed means actuated subsequently thereto.

3. In a core-making machine, the combination. of a sand-holder; pneumatically tion between the interior of said holder and a core box; means for introducing air. under pressure into said holder whereby the sand therein may. be dischargedtherefrom into said sand-box; a common source of pneu matic pressure connected with the means for establishing communication and the means for introducing air under pressure;

flow of air from said source whereby said first-named means are first actuated and said second-named means tuated subse- 4. In a core-making machine, the com- 7, and thence through the exhaust port 5. In

bination of a sand-holder; pneumaticallyl under pressure into said holder, whereby the a 2. In a core-making machine, the commatic pressure connected with the meansoperated means for establishing c0mmun1ca-' and means for automatically controlling thepressure into said holder whereby the sand necting such source with said holder and, sa d table; and means for controlling suchbination of a sand-holder having a discharge openingtherein; a table for receiving the core-box and movable toward and from said holder, whereby the said box may be brought into contact with said holder and into communication with said opening; a source of pneumatic pressure; means conconnection and arranged to first effect the movement of the table toward said holder,

and subsequently automatically connect said holder with such source.

In a core-makin machine, the combination of a sand-holder having a discharge opening therein; a table for receiving the core-box and movable toward and from said holder; whereby the said box may be brought into contact with said holder and into communication with said opening; asource of pneumatic pressure; means connecting said source with said holder and with'said table, and communicating with the atmosphere; and means for controlling such connection, adaptedfirstto effect the movement of said table, andsubsequently automatically and successively connect said source with mosphere. r

6. In a core-making machine, the combination of a sand-holder comprising a hopper, a valve for controlling the discharge from said hopper, and a sand-dischargingmember mounted so as to be movable toward and from said hopper and provided with a discharge-opening, whereby it may be brought into contact with said valve, said member being normally out of contact with the. latter; a table for receiving the core-box, and movable toward and from said discharging mmbenwvhereby said box may be brought into contact therewith and into coniniunication with said opening; means .tor efiecting the movement of said table toward said holder; and pneumatic means connected with said discharging member whereby the sand therein may be discharged through said opening.

7. In a core-making machine, the combination of a said-holder comprising a hopper, a gate-valve mounted on andadapted to close the bottom of said hopper, and a sand-discharging member opposite said valve, normally out of contact therewith and movable toward and from same, said member provided with. a discharge-opening; a table for receiving the core-box and movable toward and from said discharging member; means for effecting the movement of said table toward said member whereby the core-'box'may be brought into contact therewith and into communication with said said holder and with the at discharge-opening; and pneumatic m connected with said discharging me. whereby sand therein may be dischai through said openin 8. In a coremaking machine, the combination of a sand-holder comprising an upper hopper-member, a gate-Valve mounted upon the lower end of same and adapted to close its discharge-opening, a lower sand-discharging member having an upper inletopening and a lower discharge-opening, and movably mounted whereby its receiving end may be brought into contact with said valve; a table below said discharge-opening and movable toward and from same; means for elfecting the movement of said table toward said lower member whereby thecorebox may be brought into contactwith said discharging member and into communicw tion with said opening, and connected with said discharging member, whereby sand may be discharged therefrom" through said opening into said box.

9. In a core-making machine, the combination of a suitable frame; a sand-holder mounted upon said frame and having a lower discharge-opening therein; an airchamber formed by two members, one of which is stationary and the other of which is movable relatively thereto, said movable member being provided with a table for receiving a core-box; a source of pneumatic pressure; means having an exhaust opening into the atmosphere connecting said sand-holder and air-chamber with said source of pressure; and semi-automatic means normally cutting oif such atmospheric communication, and arranged to first effectthe movement of said table, and I subsequently to automatically efl'ect first the con-' nection of said sand-holder with said source, and then connegtvsaid air-chamber with the exhaust opening.

10. In a core-making machine, the combination of a sand-holder; a hopper immediately above said holder; means between said hopper and holder for controlling communication between same, said hopper and holder being relatively movable toward and from each other whereby said holder may be brought-into engagement with said intermediate means and thereby sealed; and means below said holder for bringing a corebox in engagement with said holder; said intermediate means being adapted to close the discharging 'end of said hopper.

Signed by me, this 25 day of April,

. CHARLES C. PETERSON. Attested by H. M. "000, F. H. Homncs. 

